I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
shmear shammer shimmer shimmery chimar chimer chamber chimera chimere chimaera chummier chambray
smear shmear mar gammier mammer namer comer jammier gummer lamber gamier rummier humeri gemmier mimbar foamer hammier rammer boomier cymar lumbar limber limmer nummary boomer vomer bummer rhymer camera seamer beamier omer yammer smeary tamer shimmery shammer maimer chimere chimer samara chamber wommera summery umber timber bomber roomier dumber rammier daymare dimmer ameer dammar roamer summary rimier ember emery mummer seemer simmer homer cummer comber hummer mair simar hemmer omber homier gammer mummery camber member tamari hammer mere foamier gummier roomer loamier mare emmer aimer fumier number amber rimer limier mammary gamer lamer sambar mimer lumber maar rummer mara seamier somber jammer damar cumber dimer dammer reamer shimmer gomer embar teemer timer summer womera woomera emeer chimar chimera rimmer chummier fumer doomier yummier
sham shame shammy shamoy shim shimmy shmo schema scheme schmo schmoe